package com.wan.lession56.web.ExceptionResolver;

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * @author anning
 */
@Component
public class MyExceptionResolver implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        ModelAndView mv = new ModelAndView();
        if (ex instanceof NullPointerException) {
            mv.setViewName("error404");
            mv.addObject("msg","有错误");
        }else if(ex instanceof ClassCastException){
            mv.setViewName("redirect:/error500.jsp");
        }else{
            mv.setViewName("redirect:/error.jsp");
        }
        return mv;
    }
}
